.htaccess - Hiding a directory in the URL while preserving other files

Question

I developed a giant studio of tools and each tool has its own directory in the /tools/ folder. So if you have a tool named example, the URL would be /studio-dir/tools/e

Answer 1

In this example there is not 404 but it only works to hide only one dir

RewriteEngine On
RewriteBase /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s/+dirname/([^\s]+) [NC]
RewriteRule ^ %1 [R=301,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule (?!^dirname/)^(.*)$ /dirname/$1 [L,NC]